fix(core): recopy Yomitan extension when patched scripts drift

src/core/services/yomitan-extension-copy.ts

@@ -0,0 +1,53 @@
+import * as fs from 'fs';
+import * as path from 'path';
+
+const YOMITAN_SYNC_SCRIPT_PATHS = [
+  path.join('js', 'app', 'popup.js'),
+  path.join('js', 'display', 'popup-main.js'),
+  path.join('js', 'display', 'display.js'),
+  path.join('js', 'display', 'display-audio.js'),
+];
+
+function readManifestVersion(manifestPath: string): string | null {
+  try {
+    const parsed = JSON.parse(fs.readFileSync(manifestPath, 'utf-8')) as { version?: unknown };
+    return typeof parsed.version === 'string' ? parsed.version : null;
+  } catch {
+    return null;
+  }
+}
+
+function areFilesEqual(sourcePath: string, targetPath: string): boolean {
+  if (!fs.existsSync(sourcePath) || !fs.existsSync(targetPath)) return false;
+  try {
+    return fs.readFileSync(sourcePath).equals(fs.readFileSync(targetPath));
+  } catch {
+    return false;
+  }
+}
+
+export function shouldCopyYomitanExtension(sourceDir: string, targetDir: string): boolean {
+  if (!fs.existsSync(targetDir)) {
+    return true;
+  }
+
+  const sourceManifest = path.join(sourceDir, 'manifest.json');
+  const targetManifest = path.join(targetDir, 'manifest.json');
+  if (!fs.existsSync(sourceManifest) || !fs.existsSync(targetManifest)) {
+    return true;
+  }
+
+  const sourceVersion = readManifestVersion(sourceManifest);
+  const targetVersion = readManifestVersion(targetManifest);
+  if (sourceVersion === null || targetVersion === null || sourceVersion !== targetVersion) {
+    return true;
+  }
+
+  for (const relativePath of YOMITAN_SYNC_SCRIPT_PATHS) {
+    if (!areFilesEqual(path.join(sourceDir, relativePath), path.join(targetDir, relativePath))) {
+      return true;
+    }
+  }
+
+  return false;
+}